diff --git a/net/net_linux.go b/net/net_linux.go
index d4f24bff..44e43195 100644
--- a/net/net_linux.go
+++ b/net/net_linux.go
@@ -421,7 +421,7 @@ func getProcInodes(root string, pid int32, max int) (map[string][]inodeMap, erro
 	defer f.Close()
 	files, err := f.Readdir(max)
 	if err != nil {
-		return ret, nil
+		return ret, err
 	}
 	for _, fd := range files {
 		inodePath := fmt.Sprintf("%s/%d/fd/%s", root, pid, fd.Name())